age ~68
from Edgewood, NM
His primary successes included Assert who won the 1982 Irish and French Derbys and Secreto who won the 1984 Epsom Derby, defeating El Gran Senor trained by his father Vincent, making David O'Brien the youngest trainer to win the race.
Their 3rd son, Charles O'Brien, recently graduated from Boston College with majors in Economics and Philosophy.